As with capital goods (tangible items such as buildings, machinery, and equipment produced and used in the production of other goods and services), the consumption of a durable good is spread over its life span, which tends to create demand for a series of maintenance services.
The event which is referred to as The Phoenix Lights comprised of a series of incidents, involving a number of different craft and orbs which took place during the evening of March 13th 1997.
Halo headlights (also known as Halos, Corona Rings, and referred to as Angel Eyes because of the distinctive arrangement of lights placed in a circular pattern) are automotive front lighting units with luminous rings inside the headlight assembly.